WO2017101460A1

WO2017101460A1 - Light combining system and projection illumination light path thereof

Info

Publication number: WO2017101460A1
Application number: PCT/CN2016/093406
Authority: WO
Inventors: 高志强; 赵远; 杨伟樑; 林清云
Original assignee: 广景视睿科技（深圳）有限公司
Priority date: 2015-12-14
Filing date: 2016-08-05
Publication date: 2017-06-22
Also published as: CN205193364U

Abstract

A light combining system and a projection illumination light path thereof, the light combining system comprising: a first light source device (11a) for generating a first beam (41a), and a second light source device (12a) for generating a second beam (42a), the incident directions of the first beam (41a) and the second beam (42a) being different but the colors thereof being same; a first collimator lens group (21a) provided on the light path of the first light source, and a second collimator lens group (22a) provided on the light path of the second light source; and a light combining device that reflects the first beam (41a) and the second beam (42a) and makes the reflected beams propagate along the same direction; the light combining device comprising: a first reflective surface (31a) that reflects the first beam (41a), and a second reflective surface (32a) that reflects the second beam (42a). The light combining system and the projection illumination light path thereof improve the light intensity of the beam, and then improve the performance of the projection device in the premise of ensuring that the size and weight satisfy the conditions, being able to give users a better visual enjoyment.

Description

Light combining system and projection illumination path thereof

Technical field

The present invention relates to the field of digital projection display technology, and more particularly to a beam combining system and a projection optical path thereof.

Background technique

With the development of science and technology, especially the promotion of semiconductor technology, portable electronic devices are constantly being designed and manufactured. The enhancement of the functions of portable electronic devices has made users' requirements for display devices of human-machine interfaces more and more oriented toward micro, large screen and high resolution. Driven by the strong demand of users, projector technology has developed rapidly in recent years. DLP, LCOS and other products have launched portable projectors with high performance, small size and light weight.

The function of the illumination module of the projection module in the projector is to convert as much as possible the large-angle distribution of the light beam, the illumination light of different shapes and brightness, into a uniform spot that is irradiated to the effective area of the display chip, thereby achieving uniformity. Bright projection display. In order to better use the projection module, the user can enjoy a better visual enjoyment. Under the premise of keeping the design of the projection optical path simple and efficient, the invention has the advantages of small size, low optical loss and enhanced light intensity for high light output. This also becomes one of the technical problems to be solved by those skilled in the art.

In the conventional projector, a group of three primary light sources are first combined to form a parallel beam, and then the beam direction is changed by a reflecting mirror to cause the beam to be incident on the display chip. Currently, in order to enhance the illumination intensity, the projection is improved. The performance of the machine is studied by using two sets of three primary color light sources as the light source device. If the above-mentioned reflective lens and other devices are used to change the beam directions of the two sets of three primary color light sources so that the light beam is incident on the display chip, the optical path is large, which is not conducive to reducing. The size of the projector and weight.

The information disclosed in this Background section is only intended to provide an understanding of the general background of the invention, and should not be construed as an admission

Summary of the invention

In view of the above technical problems, an object of the present invention is to provide a beam combining light system with a simple and reasonable structure and a compact layout, which combines two beams by a light combining device to enhance the illumination intensity, and a projection illumination path thereof; The projection device greatly improves the projection performance.

To achieve the above object, the present invention provides a light combining system comprising: a first light source device for generating a first light beam, a second light source device for generating a second light beam; and a first light beam and a second light beam incident direction Different but the same color; a first collimating lens group disposed on the optical path of the first source, a second collimating lens group disposed on the optical path of the second source; and reflecting the first beam and the second beam And a light combining device that causes the reflected light beam to propagate in the same direction; wherein the light combining device comprises: a first reflecting surface that reflects the first light beam, and a second reflecting surface that reflects the second light beam.

Preferably, in the above technical solution, the light combining device is composed of two reflective lenses with an angle of 30 degrees to 150 degrees; the first reflective surface and the second reflective surface are respectively disposed on the reflective surfaces of the two reflective lenses. on.

Preferably, in the above technical solution, the first reflective surface and the second reflective surface are plated with a metal reflective film or a high reflective film system composed of a multilayer dielectric film.

Preferably, in the above technical solution, the first light source device and the second light source device are orthogonally disposed to match the illumination spot.

Preferably, in the above technical solution, the incident directions of the first beam and the second beam are opposite.

To achieve the above object, the present invention also provides a projection illumination light path, comprising:

a first light source device for generating a first light beam, a second light source device for generating a second light beam, a third light source device for generating a third light beam, a fourth light source device for generating a fourth light beam, a fifth light source device for generating a fifth light beam, and a sixth light source device for generating a sixth light beam; wherein the first light beam and the second light beam are incident in different directions but of the same color as the first color light beam group; the third light beam and The fourth light beam has different incident directions but the same color, and is a second color light beam group; the fifth light beam and the sixth light beam have different incident directions but the same color, and are the third color light beam group; and the first light source is disposed on the first light source optical path. a collimating lens group, a second collimating lens group disposed on the optical path of the second light source, a third collimating lens group disposed on the optical path of the third light source, and a first optical path disposed on the optical path of the fourth light source a four collimating lens group, a fifth collimating lens group disposed on the optical path of the fifth light source, and a sixth collimating lens group disposed on the optical path of the sixth light source; reflecting the first color light beam group and making After reflection a first light combining device that propagates the light beam in the same direction; a second light combining device that reflects the second color light beam group and causes the reflected light beam to propagate in the same direction; and reflects the third color light beam group and causes the light beam to be reflected a third light combining device that transmits the reflected light beam in the same direction; a cross type light combining lens group, comprising: a first dichroic mirror and a second dichroic mirror; the first dichroic mirror pair is from the first light combining device The light beam is reflected, the direction of the reflection is the same as the direction of the light beam from the second light combining device; the second dichroic mirror reflects the light beam from the third light combining device, and the reflected direction is the light beam from the second light combining device The directions are the same; both the first dichroic mirror and the second dichroic mirror transmit the light beam from the second light combining device, so that the light beams from the first light combining device, the second light combining device, and the third light combining device are reflected or transmitted The trailing edge propagates in the same direction; and the relay lens and the fly-eye lens.

Preferably, in the above technical solution, the angle between the first dichroic mirror and the second dichroic mirror is 90 degrees; the first dichroic mirror and/or the second dichroic mirror may be divided into two segments. The color mirror is bonded; the first dichroic mirror includes a first working surface and a second working surface; the second dichroic mirror includes a third working surface and a fourth working surface; the first dichroic mirror The first working surface and the third working surface of the second dichroic mirror are plated with a dichroic color separation film; the second working surface of the first dichroic mirror and the fourth working surface of the second dichroic mirror are plated An anti-reflection film; the first working surface is for reflecting light from the first light combining device a second working surface for transmitting light beams from the second light combining device and the third light combining device; the third working surface for reflecting a light beam from the third light combining device, the third combined light The light beam of the device is used to transmit light beams from the first light combining device and the second light combining device.

Preferably, in the above technical solution, the first color beam group, the second color beam group, and the third color beam group are LED beams; the first color beam group, the second color beam group, and the third color beam Group, composed of three primary color beams.

Preferably, in the above technical solution, the first light source device and the second light source device are orthogonally disposed; the third light source device and the fourth light source device are orthogonally disposed; and the fifth light source device and the sixth light source device Orthogonal settings.

Preferably, in the above technical solution, the incident directions of the first beam and the second beam are opposite; the incident directions of the third beam and the fourth beam are opposite; and the incident directions of the fifth beam and the sixth beam are opposite .

The invention has the beneficial effects that the present invention provides a light combining system and a projection illumination light path thereof, the light combining system comprising: a first light source device for generating a first light beam, a second light source device for generating a second light beam; the first light beam and the second light beam are incident in different directions but of the same color; the first collimating lens group disposed on the first light source optical path is disposed on the second light source light a second collimating lens group on the road; and a light combining device that reflects the first light beam and the second light beam and causes the reflected light beam to propagate in the same direction; wherein the light combining device comprises: performing the first light beam a reflected first reflecting surface and a second reflecting surface for reflecting the second light beam; the light combining system and the projection illumination light path thereof greatly enhance the light intensity of the light beam, thereby ensuring that the size and the weight satisfy the condition, Improve the performance of the projection device, which can give users a better visual enjoyment.

DRAWINGS

1 is a schematic structural view of a preferred light combining system of the present invention;

2 is a schematic view showing a structure of a projection illumination optical path according to a preferred embodiment of the present invention.

detailed description

The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it is understood that the scope of the present invention is not limited by the specific embodiments.

The term "comprising" or variations such as "comprises" or "comprises", etc., are to be understood to include the recited elements or components, and Other components or other components are not excluded.

1 and FIG. 2; FIG. 1 is a schematic structural view of an embodiment of a beam combining system of the present invention; in this embodiment, the light combining device is composed of two reflecting lenses having an angle of 30 degrees to 150 degrees. As shown in Figure 1, a beam combining system according to an embodiment of the present invention includes: a first light source device 11a for generating a first light beam 41a, a second light source device 12a for generating a second light beam 42a; The first light beam 41a and the second light beam 42a are incident in different directions but of the same color; the first collimating lens group 21a disposed on the first light source optical path, and the second collimating lens group disposed on the second light source optical path 22a; and a light combining device that reflects the first beam and the second beam and causes the reflected beam to propagate in the same direction; wherein the light combining device includes: a first reflecting surface that reflects the first beam 41a 31a, and a second reflecting surface 32a that reflects the second light beam 42a. After the reflection, the first beam 41a and the second beam 42a can synthesize a beam 43a propagating in the same direction.

In this embodiment, the light combining device is composed of two reflecting lenses with an angle of 30 degrees to 150 degrees, for example, the angle can be set to 30 degrees, set to 150 degrees, or set to 90 degrees, or other in the 30- Any angle between 150 degrees, depending on the actual situation. The first reflecting surface 31a and the first The two reflecting surfaces 32a are respectively disposed on the reflecting surfaces of the two reflecting mirrors.

The angle between the first reflecting surface 31a and the second reflecting surface 32a may be 30 degrees to 150 degrees, which can ensure that the first reflecting surface 31a and the second reflecting surface 32a reflect the first beam 41a and the second beam 42a more effectively; In addition, the first reflective surface 31a and the second reflective surface 32a are plated with a metal reflective film or a high-reflection film system composed of a multilayer dielectric film; the angle is set to 30 degrees to 150 degrees, and the reflective film or reflective coating can also be applied. The processing of the layers is simpler and more uniform, thereby ensuring the reflective properties of the first reflecting surface 31a and the second reflecting surface 32a.

In the present embodiment, the first light source device 11a and the second light source device 12a are arranged orthogonally (for reasons of angle, not shown) to match the illumination spot; the incident directions of the first beam 41a and the second beam 42a are opposite. It can be two parallel beams with opposite incident directions; however, after the light combining device can be combined, a parallel beam of light can be incident on other devices, which greatly enhances the light intensity of the beam.

The beam combining system uses a light combining device to combine two beams from different incident directions, so that the two beams are concentrated into a beam in the same direction, which greatly enhances the light intensity of the beam, thereby ensuring the size and weight satisfying conditions. Under the premise, the performance of the projection device adopting the light combining system is improved, and the user can enjoy better visual enjoyment.

2 is a schematic structural view of a first embodiment of a projection illumination optical path of the present invention; as shown in FIG. 2, a specific structure of a projection illumination optical path according to an embodiment of the present invention includes: a first light source device 11a for generating a first light beam a second light source device 12a for generating a second light beam, a third light source device 11b for generating a third light beam, a fourth light source device 12b for generating a fourth light beam, and a fifth light source for generating a fifth light beam The device 11c is configured to generate a sixth light source device 6c; wherein the first light beam and the second light beam have different incident directions but the same color, and are the first color light beam group 3a; the third light beam and the fourth light beam have different incident directions But the color is the same, is the second color beam group 3b; the fifth beam and the sixth beam are incident in different directions but the colors are the same, and are the third color beam group 3c; the first collimating lens disposed on the optical path of the first light source 11a a group 21a, a second collimating lens group 22a disposed on the optical path of the second light source 12a, and a third surface disposed on the optical path of the third light source 11b a collimating lens group 21b, a fourth collimating lens group 22b disposed on the optical path of the fourth light source 12b, a fifth collimating lens group 21c disposed on the optical path of the fifth light source 11c, and a sixth a sixth collimating lens group 22c on the source light source 12c; a first light combining device 3a that reflects the first color light beam group and causes the reflected light beam to propagate in the same direction; and reflects the second color light beam group and causes a second light combining device 3b that transmits the reflected light beam in the same direction; a third light combining device 3c that reflects the third color light beam group and causes the reflected light beam to propagate in the same direction; and the relay lens 7 and Compound eye lens 8.

In this embodiment, the first light combining device 3a, the second light combining device 3b, and the third light combining device 3c are each composed of two reflective lenses having an angle of 30 degrees to 150 degrees, for example, the angle can be set. In 30 degrees, set to 150 degrees, or set to 90 degrees, or any other angle between 30-150 degrees, depending on the actual situation.

The cross-type combining lens group enables the light beams from the first light combining device 3a, the second light combining device 3b, and the third light combining device 3c to propagate in the same direction, and includes: a first dichroic mirror 6 and a second minute a color mirror 5; the first dichroic mirror 6 reflects the light beam from the first light combining device 3a, and the second dichroic mirror 5 reflects the light beam from the third light combining device 3c, the first dichroic mirror 6 and the The dichroic mirrors 5 each transmit a light beam from the second light combining means 3b; and a relay lens 7 and a fly-eye lens 8.

The cross-type combining lens group combines light beams from the first light combining device 3a, the second light combining device 3b, and the third light combining device 3c, wherein: the first dichroic mirror 6 and the second dichroic mirror 5 The angle between the two is 90 degrees; wherein the first dichroic mirror 6 reflects the light beam from the first light combining device 3a, and transmits the light beams from the second light combining device 3b and the third light combining device 3c; the second color separation The mirror 5 reflects the light beam from the third light combining means 3c, and transmits the light beams from the first light combining means 3a and the second light combining means 3b; notably, the first dichroic mirror 6 and/or the second dichroic mirror 5 can be bonded by two dichroic mirrors.

In the embodiment, the first dichroic mirror 6 and/or the second dichroic mirror 5 may be bonded by two dichroic mirrors; the first dichroic mirror 6 includes a first working surface 6a and a second Working face 6b; said second The dichroic mirror 5 includes a third working surface 5a for reflecting the light beam from the first light combining device 3a and a fourth working surface 5b for transmitting the second working surface 6b a light beam of the light combining device 3b and the third light combining device 3c; the third working surface 5a is for reflecting a light beam from the third light combining device 3c, and the light beam of the fourth working surface 5b is for transmitting from the first light Light beams of the optical device 3a and the second light combining device 3b.

The first working surface 6a of the first dichroic mirror 6 and the third working surface 5a of the second dichroic mirror 5 are plated with a dichroic color separation film; the second working surface 6b of the first dichroic mirror 6 And the fourth working surface 5b of the second dichroic mirror 5 is coated with an anti-reflection film to enhance the light beam and reduce the optical energy loss of the light beam.

In the present embodiment, preferably, the light beam from the first light combining device 3a and the light beam from the third light combining device 3c are sandwiched by the first dichroic mirror 6 and/or the second dichroic mirror 5. The angle is 45 degrees. The first dichroic mirror 6 and/or the second dichroic mirror 5 may be integrally formed, or may be composed of two dichroic mirrors by bonding, connecting members or the like.

The relay lens 7 and the fly-eye lens 8 are disposed on the optical path of the combined light beam from the cross-type combining lens group, and are driven by the cross-type combining lens group from the first light combining device 3a and the second light combining device. The three optical paths of the device 3b and the third light combining device 3c are combined and enter the relay lens 7 and the fly-eye lens 8. The light combining optical path is perpendicular to the central optical axis of the first light combining device 3a and/or the third light combining device 3c, and coincides with the central optical axis of the second light combining device 3b.

In this embodiment, the first color beam group, the second color beam group, and the third color beam group are LED beams; the first color beam group, the second color beam group, and the third color beam group are formed. Three primary color beams.

In this embodiment, the first light source device 11a and the second light source device 12a are orthogonally disposed; the third light source device 11b and the fourth light source device 12b are orthogonally disposed; the fifth light source device 11c and the sixth light source The devices 12c are arranged orthogonally to match the illumination spots.

In this embodiment, the incident directions of the first beam and the second beam are opposite, and may be arranged in parallel; the incident directions of the third beam and the fourth beam are opposite, and may be arranged in parallel; The incident direction of the beam and the sixth beam are opposite and can be set in parallel.

Due to the function of the light combining system, the illumination intensity of the projection beam is relatively large, which greatly increases the projection performance and display effect of the projection device, and can bring better visual enjoyment to the user.

In this embodiment, the display chip may be a DMD or an LCOS or an LCD.

The foregoing description of the specific exemplary embodiments of the present invention has The description is not intended to limit the invention to the precise forms disclosed. The embodiments were chosen and described in order to explain the particular embodiments of the invention Choose and change. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

A light combining system, comprising:

a first light source device for generating a first light beam, a second light source device for generating a second light beam; the first light beam and the second light beam are incident in different directions but of the same color;

a first collimating lens group disposed on the optical path of the first light source and a second collimating lens group disposed on the optical path of the second light source;

And a light combining device that reflects the first light beam and the second light beam and causes the reflected light beam to propagate in the same direction; wherein the light combining device includes: a first reflective surface that reflects the first light beam, and The second light beam is reflected by the second light reflecting surface.
The light combining system according to claim 1, wherein the light combining means is composed of two reflecting lenses having an angle of 30 degrees to 150 degrees; the first reflecting surface and the second reflecting surface are respectively disposed at The reflective surface of the two reflective lenses.
The light combining system according to claim 1 or 2, wherein the first reflecting surface and the second reflecting surface are plated with a metal reflective film or a high reflective film system composed of a multilayer dielectric film.
The light combining system according to claim 1 or 2, wherein the first light beam and the second light beam are incident in opposite directions.
A projection illumination light path, comprising:

a first light source device for generating a first light beam, and a second light source device for generating a second light beam;

a third light source device for generating a third light beam, a fourth light source device for generating a fourth light beam;

a fifth light source device for generating a fifth light beam, and a sixth light source device for generating a sixth light beam; wherein the first light beam and the second light beam are incident in different directions but of the same color as the first color light beam group; The light beam and the fourth light beam have different incident directions but the same color, and are the second color light beam group; the fifth light beam and the sixth light beam have different incident directions but the same color, and are the third color light beam group;

a first collimating lens group disposed on the optical path of the first light source, a second collimating lens group disposed on the optical path of the second light source, and a third collimating lens group disposed on the optical path of the third light source a fourth collimating lens group disposed on the optical path of the fourth source, a fifth collimating lens group disposed on the optical path of the fifth source, and a sixth collimating lens disposed on the optical path of the sixth source group;

a first light combining device that reflects the first color light beam group and causes the reflected light beam to propagate in the same direction; a second light combining light that reflects the second color light beam group and causes the reflected light beam to propagate in the same direction a device; and a third light combining device that reflects the third color light beam group and causes the reflected light beam to propagate in the same direction;

a cross-type combining lens group comprising: a first dichroic mirror and a second dichroic mirror; the first dichroic mirror reflects the light beam from the first light combining device, and the reflected direction is from the second light combining device The beam direction is the same; the second dichroic mirror reflects the light beam from the third light combining device, and the reflected direction is the same as the direction of the light beam from the second light combining device; the first dichroic mirror and the second dichroic mirror are both Transmitting a light beam from the second light combining device such that light beams from the first light combining device, the second light combining device, and the third light combining device are reflected or transmitted to propagate in the same direction;

And a relay lens and a fly-eye lens.
The projection illumination optical path according to claim 5, wherein an angle between the first dichroic mirror and the second dichroic mirror is 90 degrees; the first dichroic mirror and/or the second sub-division The color mirror may be bonded by two dichroic mirrors; the first dichroic mirror comprises a first working surface and a second working surface; the second dichroic mirror comprises a third working surface and a fourth working surface; a first working surface of the first dichroic mirror and a third working surface of the second dichroic mirror are plated with a dichroic color separation film; a second working surface of the first dichroic mirror and a second dichroic mirror The fourth working surface is plated with an anti-reflection film; the first working surface is for reflecting a light beam from the first light combining device, and the second working surface is for transmitting the light from the second light combining device and the third light combining device The third working surface is for reflecting a light beam from the third light combining device, and the light beam of the third light combining device is for transmitting the light beams from the first light combining device and the second light combining device.
The projection illumination optical path according to claim 5, wherein the first color beam group, the second color beam group, and the third color beam group are LED beams; the first color beam group and the second color The beam group and the third color beam group form a three primary color beam.
The projection illumination optical path according to claim 5, wherein said first light source means and said second light source means are orthogonally disposed; said third light source means and said fourth light source means are orthogonally disposed; and said fifth The light source device and the sixth light source device are disposed orthogonally.
The projection illumination optical path according to claim 5, wherein the first light beam and the second light beam are incident in opposite directions; the third light beam and the fourth light beam are incident in opposite directions; and the fifth light beam and The incident direction of the sixth beam is opposite.